/*******************************************************************************
 * File Name     : arch/arm/mach-aspeed/ast-sdmc.c
 * Author        : Ryan Chen
 * Description   : AST SDRAM Memory Ctrl
 *
 * Copyright (C) 2012-2020  ASPEED Technology Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 *
 *   History      :
 *    1. 2013/03/15 Ryan Chen Create
 *
 ******************************************************************************/
#include <common.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/arch/platform.h>

#include <asm/arch/regs-sdmc.h>
#include <asm/arch/ast-sdmc.h>

//#define AST_SDMC_LOCK

static inline u32 ast_sdmc_read(u32 reg)
{
	u32 val = readl(AST_SDMC_BASE + reg);

	debug("ast_sdmc_read : reg = 0x%08x, val = 0x%08x\n", reg, val);
	return val;
}

static inline void ast_sdmc_write(u32 val, u32 reg)
{
	debug("ast_sdmc_write : reg = 0x%08x, val = 0x%08x\n", reg, val);
#ifdef CONFIG_AST_SDMC_LOCK
	//unlock
	writel(SDMC_PROTECT_UNLOCK, AST_SDMC_BASE);
	writel(val, AST_SDMC_BASE + reg);
	//lock
	writel(0xaa, AST_SDMC_BASE);
#else
	writel(SDMC_PROTECT_UNLOCK, AST_SDMC_BASE);

	writel(val, AST_SDMC_BASE + reg);
#endif
}

u32 ast_sdmc_get_mem_size(void)
{
	u32 size = 0;
	u32 conf = ast_sdmc_read(AST_SDMC_CONFIG);

	switch (SDMC_CONFIG_MEM_GET(conf)) {
	case 0:
		size = 64;
		break;
	case 1:
		size = 128;
		break;
	case 2:
		size = 256;
		break;
	case 3:
		size = 512;
		break;
	default:
		printf("error ddr size \n");
		break;
	}

	if (conf & SDMC_CONFIG_VER_NEW) {
		size <<= 1;
	}

	return size * 1024 * 1024;
}

u8 ast_sdmc_get_eec(void)
{
	return ast_sdmc_read(AST_SDMC_CONFIG) & SDMC_CONFIG_EEC_EN;
}

u8 ast_sdmc_get_cache(void)
{
	return ast_sdmc_read(AST_SDMC_CONFIG) & SDMC_CONFIG_CACHE_EN;
}